Auto bailout flops in Senate

The news this morning says that the Senate killed the bailout for the automakers. Some news accounts blame the Republicans, but many Democrats also voted against it.
Only one article I've seen explained one of the sticking points. Senators voting against the bill wanted a stipulation that the labor costs become more competitive. Thay asked that the UAW reduce wages to that of labor costs of foreign automakers in the US. But UAW refused.
As an example, "When including all labor costs, the average UAW member working for the company costs about $73 an hour, compared to GM’s main competitor, Toyota, which pays $44 an hour to American employees."
If we are to have a free market and the automakers are to be competitive, the labor costs must also be competitive. Why should UAW workers maintain a superior advantage over autoworkers in Toyota plants in the US?
The days of UAW strong arming their demands may be over when the American automakers declare bankruptcy.